[issue21505] cx_freeze multiprocessing bug

[Davin Potts]

Davin Potts added the comment:

Closing as there is no additional information forthcoming from the OP and per 
the prior comments, Torsten's suggestion seems as helpful as anything that can 
be offered without more info.

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resolution:  -> out of date
status: pending -> closed

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[issue21505] cx_freeze multiprocessing bug

[Davin Potts]

Davin Potts added the comment:

Can the OP provide a runnable example to help us understand what they are 
actually trying to do?

There is simply not enough information for us to go on here -- Torsten's 
suggestion is a good one but we need more information to help any further.

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nosy: +davin
status: open - pending

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[issue21505] cx_freeze multiprocessing bug

[Torsten Landschoff]

Torsten Landschoff added the comment:

That sounds like you did not initialize the freeze support of the 
multiprocessing module:

https://docs.python.org/3/library/multiprocessing.html#multiprocessing.freeze_support

Basically, you need to add the following code to your main, before anything 
else:

from multiprocessing import freeze_support
freeze_support()

Interestingly, the documentation states that starting a new Process instance 
without freeze_support will raise a RuntimeError. Maybe the detection of that 
situation failed in your case?

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nosy: +torsten

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[issue21505] cx_freeze multiprocessing bug

[Shivani]

New submission from Shivani:

Hey all,
I have problem with multiprocessing and cx_freeze..
I am freezing my UI application.

i have a line in code::-

multiprocessing.set_executable(os.path.join(sys.exec_prefix, 'pythonw.exe'))

when a commented out this line, my UI keeps iterating again and again.
and when i uncomment it, without throwing any error,UI just stuck in its second 
phase.

and moreover spoiling my unfreezen code olso.

What can be the problem with multi processing and cx_freeze relation..?

Thanks in Advance.

--
components: Tkinter
messages: 218503
nosy: shivani
priority: normal
severity: normal
status: open
title: cx_freeze multiprocessing bug
versions: Python 3.3

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